Use tnsnames.ora in Oracle SQL Developer

  • In SQLDeveloper browse Tools --> Preferences, as shown in below image.

    SQLDeveloper access preferences

  • In the Preferences options expand Database --> select Advanced --> under "Tnsnames Directory" --> Browse the directory where tnsnames.ora present.
  • Then click on Ok, as shown in below diagram.
    tnsnames.ora available at Drive:\oracle\product\10x.x.x\client_x\NETWORK\ADMIN

    SQLDeveloper update tnsnames directory

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